Recent Advances in Antimony Selenide Photodetectors.

Photodetectors (PDs) rapidly capture optical signals and convert them into electrical signals, making them indispensable in a variety of applications including imaging, optical communication, remote sensing, and biological detection. Recently, antimony selenide (Sb 2 Se 3 ) has achieved remarkable progress due to its earth-abundant, low toxicity, low price, suitable bandgap width, high absorption coefficient, and unique structural characteristics. Sb 2 Se 3 has been extensively studied in solar cells, but there's a lack of timely updates in the field of PDs. A literature review based on Sb 2 Se 3 PDs is urgently warranted. This review aims to provide a concise understanding of the latest progress in Sb 2 Se 3 PDs, with a focus on the basic characteristics and the performance optimization for Sb 2 Se 3 photoconductive-type and photodiode-type detectors, including nanostructure regulation, process optimization, and stability improvement of flexible devices. Furthermore, the application progresses of Sb 2 Se 3 PDs in heart rate monitoring, and monolithic-integrated matrix images are introduced. Finally, this review presents various strategies with potential and feasibility to address challenges for the rapid development and commercial application of Sb 2 Se 3 PDs.